Nuno Espirito Santo admitted West Ham lost their heads as they slumped 3-0 at Brentford to leave them deep in relegation trouble. The Hammers’ Premier League survival is no longer in their own hands and they will find themselves back in the bottom three if Tottenham beat Aston Villa on Sunday. Brentford looked ripe for the taking having not won in six matches, but they have become West Ham’s bogey team since they were promoted and have now won eight of their 10 Premier League meetings. A Konstantinos Mavropanos own goal, Igor Thiago’s penalty and Mikkel Damsgaard’s strike did the damage for the Bees, who are right back in the mix for European qualification for the first time in their history. West Ham were left to rue Mavropanos having an equaliser ruled out for a tight offside, while Taty Castellanos hit a post twice and Crysencio Summerville rattled the crossbar. “We are disappointed, of course,” said Hammers head coach Nuno. “First half was good, really good, really positive.…